Improved saw-gummer



Nrrnn S'rn'rne Britannia @tripa L. A. DOLE, 0F SALEM, UHIO, ASSIGNOR TOHIMSELF, AND ALBERT B. SIL- VER, 0F SAME PLACE.

IMPRVED @AW-@UIMM EP..

Specification forming part of Letters Patent No. 4l5llll1, datedNovember l5, 1864,

To @ZZ whom it may concern.-

Beit known that l, L. A. DOLE, of Salem, county of Uolumbiana, State ot'Uhio, have invented a new and Improved Saw-Gummer; and I do herebydeclare that the iollowing is a full, clear, and exact descriptionthereof, reference being' had to the accompanying drawings, making partot' this speciiication, in which- Figure l is a view ot one side of myimproved sawguinmer. Fig. Z is a diametrical section through Fig. l.Fig. 3 is a sectional View showing the application of the sawgnmmer to acommon circular-saw arbor. Fig. 4 is a side elevation et' a commoncircular-saw table, showing the manner. oi' f gumming77 saws.

Similar letters of reference indicate correspondin g parts in theseveral figures.

This invention is an improvement in sawgum mers for gumming out thecurved throats of circular saws, so that the dust, die., will escapefreely therefrom during the operation of sawing.

The object of my invention is to adapt a circularrsaw gummer to bereceived upon the arbor of a circular saw, and to be secured thereon bymeans oi the collars which are employed to secure the saw in place, aswill be hereinafter described.

To enable others skilled in the art to make and use my invention, I willdescribe its construction and operation.

The grindstone A, which I propose to employ, may be made ot' anysuitable substance adapted to the purpose of gumming saws 5 but I preferto use a composition containing einery in large quantities, which ismolded in the form ot' a thin disk, with its edge beveled or rounded, asshown in Figs. 2 and 3. This grindstone has a large circular eye madethrough its center to receive two metallic plates, B C, which, when theyare brought together, as shown in Fig. 2, form an annular groove attheir circumference, adapted to receive within it the stone A. Thecircumferences of these plates have enlarged rims formed on them, asshown at a al', to give strength and also to form iianges for receivingthe stone, and those thin portions of these plates B C which yaresurrounded by said iianges are perforated, as shown at b b. Theperforation b through the plate B is made ot' suflicient size to admitwithin it the collar g on the saw-arbor g, and to allow the thin plate Uto be brought up snugly against said collar, as shown in Fig. 3, afterwhich the outer collar, g2, is forced up against the op posite side ofthe plate (l by means of the binding nut g3. The clamping-plates B C areso formed and secured together by means of screws l d d that the plate,which forms the central. portion of the gummer can be made suiiicicntlythin to occupy the place ot' a circular saw on its arbor, and to beclamped thereon by means of the collars which are used i'or clam pin gthe saw in place.

The construction of the plates B C enable me to adapt the gummer to bereceived upon a common saw-arbor without making any change whatever, andhence a separate framework adapted exclusively for supporting the gummeris rendered unnecessary.

By my invention a person who possesses a circular sawing machine, of anydescription, and also one of my improved gummers, can resharpen the sawat pleasure.

In liig. et I have represented a common circular-saw table with a gummerapplied on the saw-arbor in place ofthe saw, which latter is representedin a position for being gummed. The inclined block p (shown in thistgure) is intended as a rest for the saw during the operation of gummingit.

/Vh at I claim as new, and desire to secure by Letters Patent, is-

The employment of metallic clamps B C, constructed to receive and holdthe grindstone, and also to constitute a thin central plate forreceiving the saw-arbor and the col lars thereon, substantially asdescribed.

Witness my hand in the matter of my application for a patent on animproved sawgummer this 5th day of September, 1864:.

Witnesses C. C. BRAINARD, R. H. GARnreUns.

